We know that urban farms require less fuel for tractors and transport, but community gardens don't plant themselves.

I'm willing to forgo the cheap satisfaction of the radical pose for the deep satisfaction of radical ends.

Environmentalists and clean energy champions should stop telling people that we are working for "sustainability," which nobody understands.

We're just trying to end illegitimate government support for a single technology, which is un-American. We should be leading the world in the next generation of technological innovation. But we can't unleash private capital because of what the government is doing to stifle innovation and to choke competition.

The surest path to safe streets and peaceful communities is not more police and prisons, but ecologically sounds economic development. And that same path can lift us to a new, green economy - one with the power to lift people out of poverty while respecting and repairing the environment.

Any successful long-term strategy will require that the green wave fully and passionately embrace the principles of eco-equity.

Clean coal represents a breakthrough in the marketing of coal, but not in the science of burning coal.